I believe the that 1. offers concrete suggestions about how to improve word choice. is one of the choices not sure about the other 3
I would say work ethic because that shows how much they’re willing to work for something and it really reveals their character. If they have low work ethic they probably don’t/won’t do anything and that’s not someone you want to be around.
A. and I know john would think it absurd. but I must say what I feel and think in some way-it is such a relief!